6.6L Gas V8 & HD Transmission Powertrain (L8T/MYD)

165 topics in this forum

1. 6.6L Gas Transmission Cooler Line Recall

   By spm1us, September 5, 2021
   • 1 reply
   • 7.6k views
   • 
   • DonYukon
   • January 21, 2022

3. Liking the 6.6 gas 1 2 3 4 10

   By Carolina, February 6, 2020
   • 140 replies
   • 87k views
   • 
   • topdj
   • January 21, 2022

4. 2020 GMC 2500 HD--Wheels and Tires--OPINIONS WANTED

   By Swafford09, September 28, 2021
   • 5 replies
   • 3.1k views
   • 
   • Kjduvall
   • January 10, 2022

5. 21 Silverado 2500 HD Custom

   By Trey Eckert, December 6, 2021
   • 1 reply
   • 1.5k views
   • 
   • shakenfake
   • December 7, 2021

6. Larger tires on 6.6 gas

   By 2011Chevy, April 30, 2020   

   • Tires
   • mpg
   • 11 replies
   • 10.3k views
   • 
   • Westy5
   • November 26, 2021

7. Dual Battrey/Dual Alternators

   By hdhp, August 31, 2021
   • 5 replies
   • 7.2k views
   • 
   • sheath
   • October 21, 2021

8. 6.6 Chirp

   By jsward12, April 19, 2021
   • 7 replies
   • 4.6k views
   • 
   • GMC4Zee
   • October 19, 2021

9. 2020 2500 transmission slipping

   By Blac, November 30, 2020
   • 9 replies
   • 8k views
   • 
   • ug87
   • September 24, 2021

10. Transynd instead of DEXVI?

    By THE YETI, September 11, 2021
    • 9 replies
    • 5.4k views
    • 
    • THE YETI
    • September 12, 2021

11. Anyone use CRC GDI Intake cleaner (or equiv)?

    By mrjulian416, July 14, 2021
    • 3 replies
    • 4k views
    • 
    • mrjulian416
    • August 23, 2021

12. Shifting from Drive to Low

    By Another JR, August 19, 2021
    • 8 replies
    • 2.7k views
    • 
    • mrjulian416
    • August 19, 2021

13. What to do? 1 2 3 4

    By MacLaren, February 25, 2021
    • 45 replies
    • 10.7k views
    • 
    • Another JR
    • August 15, 2021

14. Towing ability 1 2

    By Drumnatural, August 9, 2020
    • 18 replies
    • 12.4k views
    • 
    • Another JR
    • August 13, 2021

15. 85 vs 87 Octane

    By Frank Fontana, June 23, 2021
    • 7 replies
    • 2.7k views
    • 
    • greatmizzou
    • August 12, 2021

16. 6.6L Gas will be fine, right? 1 2 3 4 6

    By Z71RAD88, February 25, 2021
    • 83 replies
    • 23.8k views
    • 
    • finn5033
    • July 14, 2021

17. Borla catback exhaust 1 2

    By Spangled, July 26, 2020
    • 27 replies
    • 20.5k views
    • 
    • Grjfer
    • July 9, 2021

18. First Oil Change 1 2 3 4

    By texasnavy05, January 29, 2020
    • 59 replies
    • 73.3k views
    • 
    • Adamace1
    • June 20, 2021

19. 2020 Silverado 2500 Lt 6.6 Gas lifter problems

    By Jesus Aguirre, June 13, 2021
    • 1 reply
    • 5.1k views
    • 
    • Ray Pickle
    • June 17, 2021

20. Potential Buyer 1 2

    By uga40, April 30, 2021
    • 15 replies
    • 4.8k views
    • 
    • KARNUT
    • June 13, 2021

21. Top Tier Gas a must for our Direct Injection Engines?

    By Jimmy-Mack, May 30, 2021
    • 7 replies
    • 3.9k views
    • 
    • THE YETI
    • May 31, 2021

22. 2020 GMC 2500 6.6 GASSER leveled with 35's MPG????

    By Gabe Bunn, October 1, 2020
    • 11 replies
    • 15.2k views
    • 
    • Ryan Morgan
    • May 19, 2021

23. 6.6 Gas Tranny cooler line-CHECK

    By CRApex, March 3, 2021
    • 3 replies
    • 3.1k views
    • 
    • Another JR
    • April 22, 2021

24. Factory ordering, any updates?

    By SnowsledBen, April 5, 2021
    • 9 replies
    • 3k views
    • 
    • maplegrovetruck
    • April 17, 2021

25. Temp and Volt Gauge Readings - normal?

    By Jimmy-Mack, March 28, 2021
    • 8 replies
    • 3.5k views
    • 
    • Wxman
    • April 13, 2021

26. At4 vs Denali ride quality

    By CaptainMorganNC, March 13, 2021
    • 14 replies
    • 14.9k views
    • 
    • MTU Alum
    • April 9, 2021